BETA-AMYLOID 42/40 RATIO PLASMA

Message

Immediate Specimen Processing: Draw blood in an EDTA lavender top tube. Invert to mix with preservatives. Centrifuge and transfer plasma to a labeled plastic transport tube within 1 hour of collection. Do not transfer to conical tube. Store frozen. Ambulatory Transport Temperature to Inova Central Lab: FrozenSpecimen Stability: 32 days

Test Code

LAB16320 BAMYL

Alias/See Also

BAMYL

CPT Codes
82233| 82234

Includes

Includes: Abeta42Abeta40ABeta 42/40 Ratio Note: Quest Diagnostics does not perform this test for individuals under the age of 18. Pre-test and post-test counseling is strongly recommended. @BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@

Instructions

Processing Instructions: Centrifuge and transfer plasma to a labeled plastic transport tube. Preferred Testing Volume: 1.2 mL plasmaMinimum Testing Volume: 0.6 mL plasmaTransport Temperature: Frozen Stability: Ambient: UnacceptableRefrigerated : 72 hoursFrozen: 32 days Causes for Rejection: Moderate or gross hemolysis Specimen collected in a glass, polystyrene, or polycarbonate tube Performing Lab: Quest Diagnostics SJCICL or Main Lab Specimen Team Only: Specimen is acceptable uncentrifuged as long as specimen is transported refigerated or on ice.

Report Available

9-Days

Clinical Significance

1230171432

Last Updated: May 18, 2026

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.